Roofing joint



June 2, 1931. BRlTTON 1,808,286

ROOFING JOINT Filed Jan. 8, 1930 INVENTOR George 6. Brw'ttan ATTORNEYS Patented June 2, 1931 orricr.

GEORGE G. BRITTON', OF ANNISTON, ALABAMA.

ROOFING JOINT Application filed January 8, 1930. Serial No; 419,347.

My invention relates to a novel joint for strip or roll roofing and more particularly to that type of joint adapted to clamp the edges of adjacent roofing strips in position so as 5 to provide a secure and weather proof seam.

An object of my invention is to provide a roofing oint which is simple of construction, inexpensive and which by the use of novel interlocking strip clamps will prevent the edges of the roofing strips from becoming readily disengaged, due to contraction or weather conditions. 7

Another object of my invention is to provide a roofing joint necessitating a minimum amount of labor in application.

More particularly my invention comprises a strip of material suitable to be nailed or otherwise secured to the roof with oppositely inclined side walls and with lock nails )rojecting upwardly therefrom and preferably substantially equi-distantly spaced throughout its length. A metallic lock plate, preferably complementary inshape to the top portion of he strip which 1t is adapted to overli will have the pointed ends of the lock nails drawn therethrough and bent to interlock the strip and plate with the roofing edges clamped in position between them. The lock nail is of such character as not to back out of the strip in the drawing operation, several forms of the lock nails suitable to this end being illustrated.

. Devices embodying features of my invention are shown in the accompanying drawings forming a part of this application, in which 1 is a transverse sectional view of a roof embodying my invention,

Fig. 2 is sectional view taken along the line fl-dl of Fig. 1,

Fi 8 a SECQlOHZLl view taken along the line III- ll of Fig. 1; and

Fig. l is a sectional view similar to Fig.

8, and showing a modified form of my invention.

Referring to the drawings for a better understanding of my invention, my improved roof joint comprises a. triangular strip 5 preferably formed of wood. A plurality of lock nails 6 are mounted transversely in the strip and have their pointed ends extending outwardly through the apex thereof. The side of the strip diametrically opposed from the nail point, is placed adjacent the roof deck 7 and the strip is then secured thereto by means of nails 8. Roofing strips 9 are positioned on each side of the strip 5 and have their adjacent edges terminating near the apex thereof.

As shown in Fig. 3, each of the pointed ends of the lock nails 6 are split to provide a pair of legs 11 and 12. The leg 11 is bent downwardly from the apex ofthe strip 5 and against one side thereof and the leg 12 provided for engagement with a lock plate The lock plate 13 is formed of relatively soft thin metal in the shape of an inverted V, having the angle between its sides conforming with the angle of the sides of the triangular strip 5. The lock plate 13 is mounted over the strip 5 and forced clownwardly, causing the leg 12 of the lock nail' 6 to pierce the metal at the apexof the V. A washer 14 is placed over the leg 12, after which the leg is bent over against one of the sides. I

As a considerable pressure is necessary to force the legs 12 through the lock plate the nails have a tendency to back out of thetriangular strip 5 which has been overcome by splitting the point of the lock nail and bending one leg 11 against one side of the strip 5.

When a roofing joint of this kind is provided the triangular strips 5 are first secured to the roof deck and are spaced to suit the width of the roofing strips 9 which are next placed in position. The lock plates 13 are then mounted over the strips 5 and forced downwardly, causing the legs 12 of the lock nails 6 to pierce the metal after which the legs 12 are hammered over causing the lock plates to be drawn into closed engagement with the triangular strip, thereby clamping the edges of the roofin strips.

Fig. 4- illustrates a modified 'orm of'my; invention in which the edges of the roofing strips are overlapped and are secured in position by means of lock nails 15 having screwlike body portions 16 to prevent displacethe roofing strips in place, and means to ment when the lock plate is being positioned prevent displacement of the bendable means and having their pointed ends unsplit. The during the clamping operation.

other parts of this construction are similar to the form already illustrated.

From the foregoing description it will be apparent that I have devised an improved form of roofing joint which is simple of construction and application and which is adapted to secure the roofing strips from becoming readily displaced.

l/Vhile I have shown my invention in but two forms, it will be obvious to those skilled in the art that it is not so limited, but is susceptible of various other changes and modifications, without departing from the spirit thereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art or as are specifically set forth in the appended claims.

,VVhat I claim is:

1. A roofing joint comprising a roof deck, a triangular strip secured to the roof deck, a lock plate mounted upon the triangular strip, roofing strips laid upon the roof deck parallel to and on opposite sides of the triangular strip and having their adjacent edges interposed between the triangular strip and the lock plate, a split nail having its split end projecting upwardly from the apex of the triangular strip and adapted to pierce and engage the lock plate to clamp the adjacent edges of the roofing material in place, and means to, prevent the nail from chang. ing its position in the triangular strip dur ing the piercing operation.

2. A roofing joint comprising a roof deck, a triangular strip secured to the roof deck, a lock plate mounted upon the triangular strip, roofing, strips laid upon the roof deck parallel to and on opposite sides of the-triangular strip and having their adjacent edges interposed between the triangular strip and the lock plate, and a nail having its pointed end extendingupwardly from the apex of the triangular strip and split to pro vide a pair of legs, one of which is adapted to pierce the lock strip and then to be bent over same to clamp the near edges of the roofing strips in place and the other leg'is adapted to be bent downwardly from the apex of the trianglar strip to preventvany movement of the nail during the piercing operation.

3. A roofing joint comprising a roof deck, a triangular strip secured to the roof deck, a lock plate mounted upon the triangular strip, roofing strips laid upon the roof deck on opposite sides of the triangular strip and having their adjacent edges interposed be tween the triangular strip and the lock plate,

bendable means projecting upwardly from the trlangular strip for engagement with the lock strip toclamp the adjacent edges of In testimony whereof I afiix my signature.

GEORGE G. BRITTON. 

